"Individuals may figure out what works best for themselves in terms of balancing sex, love, intimacy, and commitment, but collectively we are a tragically confused species. The signposts in our biology and behavior suggest as much. This seems to originate from a few places: our evolutionary past, the overlapping – but independent – drives for love, sex and reproduction, individual variation in sexual preferences and drives, and the powerful effect of culture. One would think, given the importance of sex and mating in evolution, that natural selection would have put a straight-jacket on it and given us a stricter blueprint to follow, as other species seem to have. That doesn’t seem to be the case, however."
Analysis of the "confused species". Part one.